| (19) |
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(11) |
EP 0 155 108 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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02.12.1987 Bulletin 1987/49 |
| (43) |
Date of publication A2: |
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18.09.1985 Bulletin 1985/38 |
| (22) |
Date of filing: 25.02.1985 |
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| (84) |
Designated Contracting States: |
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CH DE FR GB LI NL SE |
| (30) |
Priority: |
24.02.1984 GB 8404838
|
| (71) |
Applicant: MICRO TECHNOLOGY DEVELOPMENTS LIMITED |
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() |
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| (72) |
Inventor: |
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- Taylor, Andrew George William
()
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| |
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(57) ® A detection system for use in monitoring traffic flow along a roadway in which
the detector (1) is buried in the roadway (3) and transmits the information by radio
frequency to a receiver (4) located at a remote location, the detector incorporating
a transmission coil and a detection coil, the detection coil being responsive to entry
and exit of an object into and from the detection field produced by the transmission
coil.